U-boot with treble cut filter

[thomasha]

Hi,
today I was playing with the U-boot octave down circuit, and,
as you know, it works better with the neck pickup and the treble completely off.

Would it be possible to add this kind of filtering just to the octave side of the circuit?
It would make it more intuitive to use, and only remove the treble from the signal that is actually being used for the tracking.

How would one achieve the same kind of filtering expected from a neck pickup? Has anyone tried this?